Medical breathing unit



FIG. 1 is a front, right, top perspective view of a medical breathing unit showing my new design;

FIG. 2 is a rear, left, top perspective view thereof;

FIG. 3 is a front elevational view thereof on a reduced scale;

FIG. 4 is a right side elevational view thereof on a reduced scale;

FIG. 5 is a left side elevational view thereof on a reduced scale;

FIG. 6 is a rear elevational view thereof on a reduced scale;

FIG. 7 is a top plan view thereof on a reduced scale; and

FIG. 8 is a bottom plan view thereof on a reduced scale. 

The ornamental design for a medical breathing unit, as shown. 